One thing I learned from life is that, if you always give your hand to the others, some can (even when they did not notice it) get your entire arm instead.
It's like, ah I dont have money but the girls always pay for me. If you guys are all close to each other this way, then a good conversation about this, that their attitude is bad for you can be a good way for ending this "trouble". That's just my opinion trought x3
Sorry if any mispelling or broken english ;-;